An Orbit anti-siphon valve is an essential component of your irrigation system, helping to prevent backflow and protect your water supply. However, like any plumbing fixture, it can face issues over time. One common problem that homeowners encounter is a blown fitting on the Orbit anti-siphon valve. In this blog, we will delve into the causes of this issue and provide step-by-step guidance on how to troubleshoot and repair it effectively.

  1. Understanding the Blown Fitting: A blown fitting on the Orbit anti-siphon valve usually occurs due to excessive water pressure or freezing temperatures. The pressure can cause the fitting to crack or burst, leading to leaks and reduced functionality of the valve.
  2. Identify the Issue: Start by turning off the water supply to the irrigation system and locating the blown fitting on the anti-siphon valve. Inspect the fitting for visible cracks, breaks, or signs of water leakage.
  3. Gather Necessary Tools and Replacement Parts: Before starting the repair, ensure you have the necessary tools and replacement parts. You may need a pipe wrench, screwdriver, Teflon tape, and a new fitting compatible with the Orbit anti-siphon valve.
  4. Remove the Damaged Fitting: Carefully use the pipe wrench to loosen and remove the blown fitting from the Orbit anti-siphon valve. Take extra care not to cause further damage to the valve during this process.
  5. Clean and Prepare the Area: Thoroughly clean the area around the valve and the pipe where the fitting was removed. Remove any debris or remnants of the blown fitting to ensure a clean and secure connection.
  6. Apply Teflon Tape: Wrap Teflon tape around the threads of the new fitting to create a tight and leak-resistant seal.
  7. Install the New Fitting: Gently thread the new fitting into the opening on the Orbit anti-siphon valve. Use the pipe wrench to tighten the fitting securely but avoid overtightening to prevent damage.
  8. Test for Leaks: After the new fitting is installed, turn on the water supply to the irrigation system and check for any leaks around the repaired area. If there are no leaks, the repair is successful.


Encountering a blown fitting on an Orbit anti-siphon valve can be a frustrating experience for homeowners. However, by understanding the causes of the issue and following the step-by-step repair process, you can effectively troubleshoot and resolve the problem. Regularly inspecting and maintaining your irrigation system can help prevent such issues in the future, ensuring the efficient and uninterrupted operation of your Orbit anti-siphon valve.